Composition modification and surface microstructures have been widely utilized in interface science to improve the performance. In this paper, we observed a significant improvement of oil contact angle (CA) from 66 ± 2° 120 4° by introducing radical silanol group on flat PDMS through oxygen plasma pretreatment. By combining modification, produced three kinds superoleophobic surfaces: 20 μm pitch micropillar arrays, 2.5 arrays gecko foot-like hierarchical microstructures. Among them, with...

Biomimetic surfaces are attracting more and research attention because of the amazing characteristics living biological species, such as iridescence in flowers hibiscus trionum tulipa, superhydrophobicity on lotus leaf. Despite numerous efforts for producing fascinating micro-nanostructures that present either or superhydrophobicity, there is almost no reports artificial posses both simultaneously apart from a few examples self-organized colloidal particles. Here, we report bio-inspired...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Substitution of a single aspheric microlens (array) for complex multilens system results in not only smaller size, lighter weight, compacter geometry, and even possibly lower cost an optical system, but also significant improvement its performance such as better imaging quality. However, fabrication or array is technically challenging because conventional technologies used macro-sized aspheres...

Combination of top-down and bottom-up process is crucial for fabricating ordered complex micronanostructures. Here we report a simple, rapid, versatile approach to demonstrate this useful concept, which involves the joint use multibeam interference patterning capillary force self-organization. Regular hydrophobic arrays four-peddle nanoflowers consisting bent needles with 300 nm tip diameters are readily produced. A “domino model” based on balance support forces were proposed interpret...

In order to conduct Non - Destructive stress wave velocity measurement for Young's modulus on existing wooden buildings, we improved the conventional test by comparative studying other material methods, designing an assistant device test, proposing corresponding operating method and calculating modulus. Besides, effectiveness common used corrective value has been doubted, result of verified. could be obtained changing distance between sensors without using data.

This paper demonstrates an unconventional gas pumping method using a circulation of liquid without leaking issues. Low surface tension is employed as actuating piston to achieve effective with leak-tight sealing inside the microfluidic channel. Because excellent wettability piston, inner surfaces channel get completely wetted and any possible tiny leaky spots can be sealed. Gas pockets from intake port move smoothly along creating dead volume. Locally formed nanostructures in enable steady...

Abstract Rock stratification develops widely in unconventional reservoirs, and it increases the non-uniform of reservoir on vertical. The interfacial slip deformation can alter fracture shape when encounters weak or natural fractures, so rock play an important role propagation. In this paper, crack extension experiment about interface is established through three-point bending. digital speckle measurement technology was used order to observe change strain field, near layer, process cracks...

Compaction is an important influencing factor that makes various structural materials of road embankment and surface sufficiently dense, it becomes more effective detecting methods the compaction degree are employed to monitor quality compaction. In this paper, testing means sub grade soils was detected by acceleration sensors during process vibratory roller were presented, with which field tests performed measure drum compacted soils, then relational expression between obtained. Results...

From 2005 to 2013 among 7 districts with different vulnerability disaster, we conducted a questionnaire survey concerning how people maintain their traditional wooden houses and compared the result disaster measures of areas. Following results are obtained. 1) In all surveyed districts, seismic retrofitting had rarely been taken by residents because economic pressures property inheritance issues. 2) There familiar carpenters or trends but only few maintained at fixed intervals. It is...

This paper presents a gas pumping technique demonstrating an electrokinetically driven liquid piston, which can provide complete sealing in microfluidic channel by fully wetting the inner surface without leaving any void spots. The piston push or pull gaseous medium very effectively not allowing backflow. Successful leak-tight with zero dead volume has been achieved.

Hankel integral transform and H.M.Westergaard are two common methods for solving the differential equation of elastic surface airport rigid pavement slab. The influence slab modulus, thickness foundation reaction modulus to is studied in this paper. results can be seen conclusion.

This paper presents a novel micromachined gas pump utilizing electrokinetically driven liquid pistons in microfluidic channel.As result of our effort improving the leakage problem micro pumps, we have successfully utilized low contact angle droplet as piston to move phase medium.Because excellent wettability piston, contacting inner surfaces channel get completely wetted, which seals any possible tiny leaky spots.From newly developed pump, by circulating along channel, leak-tight air pumping...

In order to study the mechanical response of a hard rock tunnel excavated by double shield boring machine (DS-TBM), numerical method was introduced simulate TBM excavating process. The failure modes surrounding mass described based on cohesion weakening and frictional strengthening (CWFS) Mohr-Coulomb strain-softening criterion. characteristics stress field plastic zone cross longitudinal section were analyzed in detail, results compared with those intrinsic condition (when model is not...

In order to research the mechanical response of asphalt pavement under horizontal load which produced by large aircraft braking process, large-scale finite element software is used in this paper. The model main landing gear established analyze change principal mechanics indexes airfield when has different distance. results show that: a significant influence on normal stress direction, but area concentrated rear wheel. more effect shear and longitudinal stress, while less tensile surface...

PDF HTML XML Export Cite reminder Structural design of cantilevered cable-stayed reticulated shell the main stadium Yellow Dragon Sports Center in zhejiang province DOI: 10.59238/j.pt.2001.04X.004 Author: Affiliation: (1.Zhejiang Provincial Institute Architectural Design and Research;2. China Academy Building Sciences;) Clc Number: TU757 Fund Project: Article | Figures Metrics Reference Related Cited by Materials Comments Abstract:The canopy Zhejiang Huanglong adopts diagonal net structure,...